Noun

• S: (n) dwindling, dwindling away (a becoming gradually less) "there is no greater sadness that the dwindling away of a family"

Verb

• S: (v) dwindle, dwindle away, dwindle down (become smaller or lose substance) "Her savings dwindled down"

Adjective

• S: (adj) dwindling, tapering, tapering off (gradually decreasing until little remains)